curly tail

Just wondering how many sphynx on the forum have a kinked tail ? That is the tail bones aren't straight particularly at the tip - post pics too please ! Trauma and injury ruled out by vet .....

Genghis is eight months on May 4 and he's has loose stool with occasional bright red blood at the end since I brought him home around Thanksgiving. I have been back and forth with the vet. His stools and my other cats stools test negative. Propectalin and pumpkin do not work. No vomiting...